Core

The Core is a sphere of energy, every game in the series has the various Cores around Elysion 1 and other locations in LOEK III as your main goal. The Cores themselves through some means creates oxygen, as LOEK III is normally void of oxygen in it's atmosphere.

In Sanctum and Super Sanctum TD, any enemy that touches the Core will disintegrate, but will inflict a predefined amount of damage depending on the type of enemy and difficulty level. In Sanctum 2, an enemy near the Core will instead continuously attack it until killed.